c++在vs2019中运行代码163行显示访问权限错误

Question

#pragma once
#include<iostream>
#include<fstream>
#define FILENAME "stulist.txt"
using namespace std;

struct StuNode
{

    StuNode(int num, int math, int eng, int yuwen, int sum);

    int num; // sutdent number
    int math, eng, yuwen; // module name
    int sum; // total marks
    StuNode* nextstu; // node link
};


class SInfo
{
    StuNode* StuListHead;
public:

    bool m_FileIsEmpty;


    //学生数组指针
    StuNode** m_StuArry;

    //记录学生人数
    int m_StuNum;

    //初始化学生
    void init_Stu();

    //统计文件中人数
    int get_StuNum();




    SInfo();      //Constructor 构造函数 初始化数据 显示菜单
    ~SInfo();    //Destructor 析构
    void StuInsert(int snum, int smath, int seng, int syuwen);  //Insert student information 3、附加的学生信息

};


StuNode::StuNode(int num, int math, int eng, int yuwen, int sum)
{
    this->eng = eng;
    this->math = math;
    this->num = num;
    this->sum = sum;
    this->yuwen = yuwen;
}


SInfo::SInfo()
{
    //初始化属性

    //文件不存在
    ifstream ifs;
    ifs.open(FILENAME, ios::in);//读文件

    //1.文件不存在的情况
    if (!ifs.is_open())
    {
        //cout << "文件不存在" << endl;
        //初始化属性
        //初始化记录人数
        this->m_StuNum = 0;
        //初始化数组指针
        this->m_StuArry = NULL;
        //初始化文件是否为空
        this->m_FileIsEmpty = true;
        ifs.close();
        return;
    }
    //2.文件存在 数据为空
    char ch;
    ifs >> ch;
    if (ifs.eof())
    {
        //文件为空
        //cout << "文件为空！" << endl;
        //初始化属性
        //初始化记录人数
        this->m_StuNum = 0;
        //初始化数组指针
        this->m_StuArry = NULL;
        //初始化文件是否为空
        this->m_FileIsEmpty = true;
        ifs.close();
        return;
    }

    //3、文件存在，并记录属性
    int num = this->get_StuNum();
    this->m_StuNum = num;

    //开辟空间
    this->m_StuArry = new    StuNode * [this->m_StuNum];
    //将文件中的数据，存到数组中
    this->init_Stu();
}


//insert student information 3、附加的学生信息
void SInfo::StuInsert(int snum, int smath, int seng, int syuwen)
{
    //合函数
    int ssum = 0;
    //添加
    //计算添加新的空间大小
    int newSize = this->m_StuNum + 1;//新空间大小 = 原来记录人数 + 新增人数

    //开辟新空间

    StuNode** newSpace = new StuNode * [newSize];

    //将原来空间下数据，拷贝到新空间下
    if (this->m_StuArry != NULL)
    {
        for (int i = 0; i < this->m_StuNum; i++)
        {
            newSpace[i] = this->m_StuArry[i];
        }
    }


    cout << "Please enter student information:" << endl;
    cout << "Num >> Math >> English >> Chinese  " << endl;
    cin >> snum >> smath >> seng >> syuwen;

    StuNode* student = NULL;


    //判断是否输入正确
    if (cin.good())
    {
        ssum = smath + seng + syuwen;

        student = new StuNode(snum, smath, seng, syuwen, ssum);

        newSpace[this->m_StuNum + 1] = student;


        //释放原有空间
        delete[] this->m_StuArry;

        //更改新空间的指向
        this->m_StuArry = newSpace;

        //更新新的职工人数
        this->m_StuNum = newSize;

        this->m_FileIsEmpty = false;

        for (int i = 0; i < this->m_StuNum; i++)
        {

            cout << this->m_StuArry[i]->num << " "
                << this->m_StuArry[i]->math << " "
                << this->m_StuArry[i]->eng << " "
                << this->m_StuArry[i]->yuwen << " "
                << this->m_StuArry[i]->sum << " "
                << endl;
        }

        cout << endl;
        cout << "The addition was successful" << endl;
        cout << endl;
    }
    else
    {
        cout << endl;
        cout << "Wrong data type entered,will return to the menu" << endl;
        cin.clear();
        while (cin.get() != '\n')
            continue;

    }


    system("pause");
    system("cls");
}


//统计文件中的人数
int SInfo::get_StuNum()
{
    ifstream ifs;
    ifs.open(FILENAME, ::ios::in);//打开文件 读

    int num; // sutdent number
    int math, eng, yuwen; // module name
    int sum; // total marks

    int Num = 0;

    while (ifs >> num && ifs >> math && ifs >> eng && ifs >> yuwen && ifs >> sum)
    {
        //统计人数变量
        Num++;
    }

    return Num;
}


//初始化学生
void SInfo::init_Stu()
{
    ifstream ifs;
    ifs.open(FILENAME, ios::in);

    int num; // sutdent number
    int math, eng, yuwen; // module name
    int sum; // total marks

    int index = 0;
    while (ifs >> num && ifs >> math && ifs >> eng && ifs >> yuwen && ifs >> sum)
    {
        StuNode* student = NULL;

        student = new StuNode(num, math, eng, yuwen, sum);

        this->m_StuArry[index] = student;

        index++;
    }

    //关闭文件
    ifs.close();

}

SInfo::~SInfo()
{

}
int main()
{


    SInfo wm;
    wm.StuInsert(0,0,0,0);



    system("pause");
    return 0;
}

Answer 1

newSpace[this->m_StuNum + 1] = student 这里应该是：
newSpace[this->m_StuNum ] = student